Before the feeder enters the equipment room from the feeder entrance, a () is required to prevent rainwater from seeping into the equipment room along the feeder.

Before the feeder enters the equipment room from the feeder entrance, a () is required to prevent rainwater from seeping into the equipment room along the feeder.
A . Go around in a circle
B . Drip Bend
C . Straight penetration
D . All of the above are possible

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Answer: B